Ansa‐Bridged Bis(benzene) Titanium Complexes. Issue 31 (25th June 2015)

• Record Type: Journal Article
• Authors: Braunschweig, Holger; Brückner, Charlotte; Celik, Mehmet Ali; Dück, Klaus; Hupp, Florian; Kramer, Thomas; Krebs, Johannes; Krummenacher, Ivo
• Is Part Of: Chemistry. Volume 21:Issue 31(2015)
• Page Start: 11056
• Page End: 11064
• Publication Date: 2015-06-25
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201500737
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Taking advantage of an improved synthesis of [Ti(η⁶‐C₆H₆)₂], we report here the first examples of <italic>ansa</italic>‐bridged bis(benzene) titanium complexes. Deprotonation of [Ti(η⁶‐C₆H₆)₂] with <italic>n</italic>BuLi in the presence of <italic>N</italic>, <italic>N</italic>, <italic>N</italic>′, <italic>N</italic>′′, <italic>N</italic>′′‐pentamethyldiethylenetriamine (pmdta) leads to the corresponding 1, 1′‐dilithio salt [Ti(η⁶‐C₆H₅Li)₂]<bold>⋅</bold>pmdta that enables the preparation of the first one‐ and two‐atom‐bridged complexes by simple salt metathesis. The <italic>ansa</italic> complexes were fully characterized (NMR spectroscopy, UV/Vis spectroscopy, elemental analysis, and X‐ray crystallography) and further studied electrochemically and computationally. Moreover, [Ti(η⁶‐C₆H₆)₂] is found to react with the Lewis base 1, 3‐dimethylimidazole‐2‐ylidene (IMe) to give the bent sandwich complex [Ti(η⁶‐C₆H₆)₂(IMe)].</p> </abstract>